Door-lock.



DOOR LOCK.

APPLICATION FVILED 00T. 25, 1907.

.Patented Mar. 23, A1915.

5ft/newton To all whom it may concern.'

Aio

iinirnnsrnrns PATENT onirica Elton E. wEs'rLiN, OEJAEHNGTON, vNEwHJERsEY, AssiGNoE To orIsEL-Evnron-f.. coMrANC 0E JEiisEiqorTY, NEWJERSEY, A CORPORATION 0E NEW JERSEY.

insensa- Be it known that I, Brion E. WEs'rLiN, a citizen'`- "of theUnited States, residing at Arlington, in ,the countyof` Hudson and Stateof New Jersey, have invented a new and useful Improvement in DoorLockgofwhich the following is aspecication.

My invention relates to door locks especially adapted 'for use inconnection with electrically controlled elevators. n

I Oneof the objects'of'the 'invention is. to provide anl improvedconstruction which shall operate as a safety device to prevent thecircuit controlled by the lock frombeing closed before the door islocked, even when theparts become worn or are.fout ofproper alinement byreason of the door sagging or warping,'or for other reasons.

Another object of the invention is to provide a universal door lock ofthe above character adapted for use with the various forms of doors usedin connection with elevators, and adapted to the varying conditionsfound in elevator practice.

Other objects will appear more fully hereinafter, and the novelcombinations of elementswill be pointed out in the appended claims.

Referringto the drawings, Figure. 1 is a plan View', of the door lock`applied to a swinging'door and showing the door and j amb in section;Fig. 2 is an elevation of the same; Fig. 3 is a view similar to'Fig. 2showing the loclrturned upside down or en'd for end and certain partsreversed to suit this position; Fig. 4; is a plan View of the door lockapplied to a sliding door; Fig. 5 is an elevation thereof; and Fig. 6 isa view similar to' F igg, showing the lock in a reverse'position, Figs.5 and 6 corresponding vto Figs. 3 and 2,^respectively.

Referring to F'gs. 1 and 2, the door lock casing comprises a bodyYportion 1 and a lock` plate 2 which carries the lock mechanism, andwhich is secured to the door jamb'. The/swinging door. 4 carries acatch' secured in position byl the plate 6.

The door jamb is formed with a rabbet 29 -to' receive the edge of the.door-and form a stop for the door when'closed'. latch 7 is pivoted. on astud ,8 on the plate 2, and is removably secured by a cotter pin 9.Pivoted to the latch 7 is a depending rod 102 the lower portion of whichis reduced in diamnooit-Loom 'is mounted a sleeve 12 of liber orother'in- Specicationo'f.Letterslfatent. i ,l Patented Mr. 23, 1915"Application sied october 25,1907. sangria. sysaioo.

sulating material, held against sliding movement on the stem by frictionor otherwise. Above the sleeve 12 is a metalrcontact strip or plate 13'slidingly mounted on the f stem 11 and yieldingly held` against thesleeve 12 by a coil spring 14. The contact strip 13 is adapted 'tobridge two metal contact plates 15 and 416 when the rod 410 is lowered.These contact plates are mounted on a plate 17 of insulating materialsecured to the casing by screws 18.' Mounted in the plate 16 and anothercontaot carrying plate 19 are a pair of Contact rods 2() which eX- tendthrough a iange21 formed on the insulating plate 17, and` project beyondthe side of the casing. Thesecontact rods areA i yieldingly held intheir outward position by coil springs 22, and are adapted to be bridgedby a metal contact strip 23, carried .75

by but insulated from the catch plate 6 on the door. Binding screws211,25 on the contact plates 15 and 19, respectively, form means forconnecting the wires ofthe controlling circuit which is completedbetween said binding screws when the contact strips 18 and23' bridgetheir.` respective contacts.

Journa'led in a bearing lug 25 and .ex-`

tending laterally from the lock case is a rock-shaft 26. crank arm 27isremovably secured to the rockshaft by a screw-bolt 2S, and carries atits outer end a cain-engaging roller 30. A pin 31 carried by the.rockshaft 26 near its-inner end is adapted to engage a' pin 32 extending'laterally from the rod 10, and lift the latch 7 when fthe shaft isrocked. The movement 4of the rockshaft in the opposite direction limited`by the pin 31 engaging a stopl 31. f

- The latch 7 is of rather peculiarconstruction, being formed lwith twodownwardly extending noses or projections a and'bwith a recess 33between them and a recess 34 behind the nose b. The catch 5 is adaptedto enter the recess 33 when the door is in the ioo position shown inFigs. 1 and 2 and lock it against being opened. In this positionthevcontacts 20 are separated from the Contact strip 23, and the contactstrip 13 is held out of contact with the platesl, 16. Itl'ie door isswung in to its fully closed position, the nse Z2 rides over and engagesbehind the catch 5.- In this position the bridging con tact-strips 13and 23 are both in engagement with their contacts and a circult isclosed between the binding screws 24, 25.v The peculiar form of-latch 7as above described forms an important vfeature of my invention, as willappear presently. Y

The rock-shaft 26 is 'operated by means of a cam on the elevator carcoming in contact with the roller 30 and swinging the `arm 27 wheneverthe caris brought to rest in a position opposite the door to which thelock is attached. lVhen the shaft is rocked thc pinA 31 lifts the rod 10and with it the latch 7, and unlocks the door. lIhe operation of therock-shaft by 'means of a cam on the elevator car being a feature wellknown to I those skilled in the art, and forming no part of thepresent'invention, it is not deemed necessary to illustrate it in thiscase. It has also been thought unnecessary to show the controllingcircuit whichl is opened and closed .by thendoor lock, as this is not apart of app'licants invention.

In, operation, if the door is not fully closed, the parts/,will assumethe position lshown in Fig. 2 in which the controlling circuit' isopenand the car cannotl be moved until the door'jis completely closed.No

special advantage obtains from'the use of this double-nosed latch solong as the various parts remain properly adjusted and unworn. If,however, the -door should sag, or the latch should be filed or becomeworn, or the parts otherwise out of their relative .position so that theContact strip 13 is lowered to contacting position before the door` thecontact v23 before the latch is closed,

would complete the circuit and permit the car to be started beforet-hedoor was locked.

If. the nose a'were omitted entirely, the resul't would be the same when:the parts were out of adjustment vas with the recess 33 omitted. Also,with the nose a omitted, if

p the door should become warped or the relative position of the partsotherwise changed to bring the contacts 20 and 2,3 nearer together, thecircuit might be closed through said ,contacts before the latch Twaslifted `to open the circuitfat contact 13, and therefore againpermit'the operation of the car before the door was locked. The nose bcould not be omitted, as it is necessary to hold the contactsA20'against the strip 23 and-,retain the controller circuit closed andpermit the operation of the car. It will thils ',be' seen that thepeculiar construction uliof lthe'latch. vinsure-s .the locking ofthedodr before the car is operated, while atjtheame time permitting aWide range of variation in the relative positions of the parts.y '1. Y

F 3 shows the lock adapted for 'with a door swinging shut from the,right instead of trom the left as viewedin Fig. 1. The same lock usedasin Figs. 1 and 2, but with the arrangement of parts ,changed asfollows The .entire lock` is reversed or turned end for end, the latch 7is reversed on its pivot 8, so that the noses d, b' project downwardly,.pin 31 on the rock-shaft is positioned on the opposite side of the pin32, the crank arm 27 is reversed on its shaft so as to extend upwardly,the contact strip 13 is placed at the outer end of the insulatinglsleeve 112, the stop -31 :is removed and. a ring or washer 14 isxplacedonl the stem 11 as astop for the spring 14. The plate 6 is also. turnedend forend.- and the position of the catch 5 relative to the plate 6 isretached to a bracket 40 on the door jamb. f

The catch .plate 6' is also attached to a bracket L11 on the door. Thelock mecha= nisln itself is arranged as in'F-ig. 3, except that therock-shaft 26 extends in a-direction at right angles to that of Fig.v 3in` order that kits crank arm 27 and roller`3() may beproperlypositioned in the elevator shaft. y y

Fig. 6 shows vthe lock applied to a sliding door closing from theleft'instead of from the right 'as inFigs. 4 and 5.. Fig. 6 bears thesame relation to Fig. 5 that Fig. 2 does to Fig. 3. 4 From the foregoingdescription taken in connection'with the drawings it will be apparentthat the door lock is adapted, with a iew changes in the arrangement ofparts, to both sliding and swinging doors, and doors opening either tothe right or to the left. These changes are readily made-When the lockcase is open. Another valuable feature of the present invention is thatwhen the case is open all the partsA are exposed to view s0 that repairscan lreadily be made. l

I do not wish to belimited to the exact constructions shown,.as variouschanges in details of construction andv arrangement of! parts mightbe--made' without departing from the spirit and scope of the invention.What-I claim as new and desire to secure by Letters Patent ofthe UnitedStates is 1. In a door lock, the combination of electricalcontactscarried by the door and jamb and movable into engagement whenthe doorI is closed, mechanisn-i. forlocking the door against openingbefore said contacts are' brought l into engagement, and' meanscomprising an additional contact devicein circuit with saidelectricalcontacts and opto 'be engaged as the door approaches itsclosed position, of a catch, a latch formederated by Vsaid-mechanism forcontrolling an electric circuit through said contacts.

2. In a door lock, the 'combination ,withl electrical contacts on thedoor and jamb po.

sitioned to be engaged when the door is al most closed, of mechanism forlocking the door against opening movementJ lbefore it reaches positionto 'engage said contacts, and

operative also to lock the door when fullyv closed, and means operatedby said mechanism to control an-electric circuit through said electricalcontacts. v I

3. In a door lock, the combination with electrica-l contacts on the doorand jamb in s position 4to be brought into engagement as l mechanismforvlocking the door against 'bethe doorla'pproaches its closedposition, of mechanism for locking the door against opening movementvbefore thecontacts are engaged, and operative also to lock the door inlits fully closed position, and means op-z erated by -said mechanism tocontrol a circuit v.through said contacts.

In va door lock, the combination with j contacts on the -jamb and doorin position withtwo noses adapted to engage the catch and lock the dooragainst opening movement before and after the contacts have been broughtinto engagement, and means operatively connected to 'said latch tocontrol an electric circuit.

5. In a door lock, the combination with a catch on the door, of apivoted latch supported by the door jamb and formed with two projectionspositioned to engage the` catch respectively before and after the dooris fully closed, and electrical contacts carried bythe door and latch,respectively, and movable into engagement only after the door is fullyclosed.

6. In a door lock, the combination o f a device for locking the dooragainst being opened when it has reached a nearly but'not fully closedposition, and an electrical switch operated by said device only when thedoor is fully closed.

door locking means.

` Witnesses:

means for locking the door closed, of a switch operated by said means,and a second switch comprising `co-acting contacts carried by the doorand door jamb and arranged in circuit with the first named switch andoperated by the door independently of the 8. In a door lock, thecombination with( means for locking the door, of a switch operated bysaid means, anda second .switch operative independently ofsaid firstswitch and controlling the same circuit as said first named switch andcomprising contacts on thedoor jamb and door, respectively.

9. In aldoor 'lock,thecombinationwith ing opened after it reaches anearly closed saidmechanismand closed thereby'as the door is lockedinitsjclosed position, and' a second` switch infseries with,l the.firstand having contacts on.the door! lj amb and door, respectively, inposition. to Abe:cm'mected after said mechanismhas operated. r y

10. In a door lock, the combination with a case attached tothe doorjamb, of a latch pivoted in the' case and-extending laterally therefrom,a rod pivoted to the latch, a con'- l tact carried thereby, a stationarycontact in position to be engaged by the contact-on -the rod fwhen thelatch is lowered, andl'a catch on the door, said latch being formed withtwo notches, one to receive theQcatch when the door is nearlyclosedandlockl the door against opening movement but "withsaid contactsseparated, and the other' notch to receive the catch when the doorlsfully In testimony whereof, I have signed closed, and also permitengagement 'of said contacts. A

name to this specification in the lpresenc'efoi'f two subscribingwitnesses..`

Bnon 'wnsrmn A. M. ZABm-snm, W. BRADY.

